/*
 * Licensed to Nanjing RedOrange Co. ltd (RedOrange) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * RedOrange licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package redora.rdo.util;

import java.util.logging.Level;
import java.util.logging.Logger;

import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.xml.sax.ErrorHandler;
import org.xml.sax.SAXParseException;

/**
 * Schema validation error handle
 * 
 * @author rick
 * 
 */
public class DefaultErrorHandler implements ErrorHandler {

	private static Logger l = Logger
			.getLogger("redora.rdo.util.DefaultErrorHandler");

	private Element errors;

	public DefaultErrorHandler() {
		this.errors = DocumentHelper.createElement("errors");
	}

	public DefaultErrorHandler(Element errors) {
		this.errors = errors;
	}

	/**
	 * @return the errors
	 */
	public Element getErrors() {
		return errors;
	}

	/**
	 * @param errors
	 *            the errors to set
	 */
	public void setErrors(Element errors) {
		this.errors = errors;
	}

	/**
	 * add exception
	 */
	protected void addException(Element element, SAXParseException exception) {
		element.addAttribute("column", Integer.toString(exception
				.getColumnNumber()));
		element.addAttribute("line", Integer
				.toString(exception.getLineNumber()));

		String publicId = exception.getPublicId();
		if (publicId != null && publicId.length() > 0) {
			element.addAttribute("publicId", publicId);
		}

		String systemId = exception.getSystemId();
		if (systemId != null && systemId.length() > 0) {
			element.addAttribute("systemId", systemId);
		}

		element.addText(exception.getMessage());
	}

	/**
	 * (non-Javadoc)
	 * 
	 * @see org.xml.sax.ErrorHandler#error(org.xml.sax.SAXParseException)
	 */
	public void error(SAXParseException exception) {
		Element element = errors.addElement("errors");
		addException(element, exception);
		l.log(Level.FINE, "XML file is invalid: " + errors.asXML());
	}

	/**
	 * (non-Javadoc)
	 * 
	 * @see org.xml.sax.ErrorHandler#fatalError(org.xml.sax.SAXParseException)
	 */
	public void fatalError(SAXParseException exception) {
		Element element = errors.addElement("fatalError");
		addException(element, exception);
		l.log(Level.FINE, "XML file is invalid: " + errors.asXML());
	}

	/**
	 * (non-Javadoc)
	 * 
	 * @see org.xml.sax.ErrorHandler#warning(org.xml.sax.SAXParseException)
	 */
	public void warning(SAXParseException exception) {
		Element element = errors.addElement("warning");
		addException(element, exception);
		l.log(Level.FINE, "XML file is invalid: " + errors.asXML());
	}
}
